Question

What will be the genotype of a carrier individual who shows sickle cell anaemic trait?

• A. Hb$^{B}$ Hb$^{B}$
• B. Hb$^{A}$ Hb$^{S}$
• C. Hb$^{S}$ Hb$^{S}$
• D. Hb$^{A}$ Hb$^{A}$

Hint:

{Hb$^{A}$Hb$^{S}$ = carrier}, {Hb$^{S}$Hb$^{S}$ = diseased}.

Answer 1

The Correct Option is B

Step 1: Understanding sickle cell anaemia.
Sickle cell anaemia is a genetic disorder caused by a mutation in the gene coding for haemoglobin.

Step 2: Identifying the carrier genotype.
A carrier individual has one normal haemoglobin allele (Hb$^{A}$) and one sickle allele (Hb$^{S}$). Such individuals usually do not show severe symptoms.

Step 3: Conclusion.
Therefore, the genotype of a carrier individual is Hb$^{A$ Hb$^{S}$}.